%?ADDCIRCLE
%
%?A?circle?generator?for?adding?（drawing）?weights?into?a?Hough?accumulator
%?array.（添加一個圓到hough累加陣列中）
%
%?Usage:??h?=?addcircle（h?c?radius?weight）
%?
%?Arguments:
%????????????h??????-?2D?accumulator?array.
%????????????c??????-?[xy]?coords?of?centre?of?circle.
%????????????radius?-?radius?of?the?circle
%????????????weight?-?optional?weight?of?values?to?be?added?to?the
%?????????????????????accumulator?array?（defaults?to?1）
%
%?Returns:???h?-?Updated?accumulator?array.

%?Peter?Kovesi
%?Department?of?Computer?Science?&?Software?Engineering
%?The?University?of?Western?Australia
%?April?2002

function?h?=?addcircle（h?c?radius?weight）

????[hr?hc]?=?size（h）;
????
????if?nargin?==?3
	weight?=?1;
????end
????
????%?c?and?radius?must?be?integers
????if?any（c-fix（c））
	error（‘Circle?centre?must?be?in?integer?coordinates‘）;
????end
????
????if?radius-fix（radius）
	error（‘Radius?must?be?an?integer‘）;
????end
????
????x?=?0:fix（radius/sqrt（2））;
????costheta?=?sqrt（1?-?（x.^2?/?radius^2））;
????y?=?round（radius*costheta）;
????
????%?Now?fill?in?the?8-way?symmetric?points?on?a?circle?given?coords?
????%?[px?py]?of?a?point?on?the?circle.
????
????px?=?c（2）?+?[x??y??y??x?-x?-y?-y?-x];
????py?=?c（1）?+?[y??x?-x?-y?-y?-x??x??y];

????%?Cull?points?that?are?outside?limits
????validx?=?px>=1?&?px<=hr;
????validy?=?py>=1?&?py<=hc;????
????valid?=?find（validx?&?validy）;

????px?=?px（valid）;
????py?=?py（valid）;
????
????ind?=?px+（py-1）*hr;
????h（ind）?=?h（ind）?+?weight;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????308278??2004-11-08?22:29??0033_006.bmp

?????文件?????261919??2008-12-19?19:54??0023_006.bmp-houghpara.mat

?????文件?????251373??2008-12-19?10:03??0025_001.bmp-houghpara.mat

?????文件?????250228??2008-12-19?19:53??0025_006.bmp-houghpara.mat

?????文件?????240812??2008-12-19?10:04??0025_002.bmp-houghpara.mat

?????文件?????240603??2008-12-19?20:55??0033_006.bmp-houghpara.mat

?????文件??????41058??2008-12-16?19:45??testP.jpg

?????文件???????5407??2008-12-20?11:31??normaliseiris.m

?????文件???????3885??2008-12-19?19:42??createiristemplate.m

?????文件???????3809??2008-12-12?21:06??hough.txt

?????文件???????3699??2008-12-09?16:58??nonmaxsup.m

?????文件???????3684??2008-12-19?10:03??segmentiris.m

?????文件???????3340??2008-12-09?19:39??hysthresh.m

?????文件???????2817??2008-12-19?16:00??writeoriginal.m

?????文件???????2618??2008-12-17?15:56??gaborconvolve.m

?????文件???????2499??2008-12-19?09:59??findcircle.m

?????文件???????2490??2008-12-17?10:42??encode.m

?????文件???????2350??2008-12-19?16:57??Untitled.m

?????文件???????2180??2008-12-09?21:45??canny.m

?????文件???????1780??2008-12-09?19:45??gethammingdistance.m

?????文件???????1709??2008-12-20?09:57??final2.m

?????文件???????1691??2008-12-09?19:59??circlecoords.m

?????文件???????1622??2008-12-09?16:56??shiftbits.m

?????文件???????1503??2008-12-09?20:13??addcircle.m

?????文件???????1432??2003-11-30?13:44??README.txt

?????文件???????1420??2008-12-19?15:40??findline.m

?????文件???????1202??2009-02-25?10:09??說明.txt

?????文件????????979??2008-12-09?19:40??houghcircle.m

?????文件????????864??2008-12-09?20:00??adjgamma.m

?????文件????????847??2008-12-09?19:27??linecoords.m

............此處省略7個文件信息